Moved AWS modules over to common module fragments

Created common module doc fragment, and applied to all
modules that use ec2_connect or connect_to_aws as
they definitely share the common doc fragments

library/cloud/ec2

@@ -110,24 +110,6 @@ options:
       - how long to wait for the spot instance request to be fulfilled
     default: 600
     aliases: []
-  ec2_url:
-    description:
-      - Url to use to connect to EC2 or your Eucalyptus cloud (by default the module will use EC2 endpoints).  Must be specified if region is not used. If not set then the value of the EC2_URL environment variable, if any, is used
-    required: false
-    default: null
-    aliases: []
-  aws_secret_key:
-    description:
-      - AWS secret key. If not set then the value of the AWS_SECRET_KEY environment variable is used. 
-    required: false
-    default: null
-    aliases: [ 'ec2_secret_key', 'secret_key' ]
-  aws_access_key:
-    description:
-      - AWS access key. If not set then the value of the AWS_ACCESS_KEY environment variable is used.
-    required: false
-    default: null
-    aliases: [ 'ec2_access_key', 'access_key' ]
   count:
     description:
       - number of instances to launch
@@ -237,31 +219,9 @@ options:
     required: false
     default: null
     aliases: []
-  validate_certs:
-    description:
-      - When set to "no", SSL certificates will not be validated for boto versions >= 2.6.0.
-    required: false
-    default: "yes"
-    choices: ["yes", "no"]
-    aliases: []
-    version_added: "1.5"
-  profile:
-    description:
-      - uses a boto profile. Only works with boto >= 2.24.0
-    required: false
-    default: null
-    aliases: []
-    version_added: "1.6"
-  security_token:
-    description:
-      - security token to authenticate against AWS
-    required: false
-    default: null
-    aliases: []
-    version_added: "1.6"
 
-requirements: [ "boto" ]
 author: Seth Vidal, Tim Gerla, Lester Wade
+extends_documentation_fragment: aws
 '''
 
 EXAMPLES = '''